[sdiy] SOlder Paste Masks?

[Ryan Williams]

how small are you talking about? I did this board with .65mm pitch with 
just a normal iron and small tip:
http://www.sdiy.org/destrukto/school/ad9850-2nd-c.jpg

this was on a circuit board I made and the pads weren't milled 
perfectly. that makes it more difficult.   i actually managed to do one 
on another board with a .5mm pitch tqfp. My method doesn't look as cool 
as the draging, but it is similar. I put down a tiny amount of solder 
(tiny) on each pad, then placed the chip. then heated each pin at a 
time. also put on some paste flux before.

I was trying to do it like shown in this video, although I had to add 
solder before hand:
http://www.kevinro.com/newdocs/learningcenter/SolderMount.rm

-ryan

Tom Arnold wrote:
> 
> The chips I'm dealing with are way way way fine pitch, I dont know if drag
> soldering will do it.  I may just try applying paste with a pipette as paste
> is dirt cheap when you pick it up by the gallon surplus...
>